Plug.



D. D. (101111011. PLUG.

APPLICATION FILED APRLI, 1911.

1,043,823, Patented Nov. 12, 1912.

WQW- rrn srairns WENT Qitldl -OE.

DAVID 1). season, or CHICAGO, ILLINOIS.

PLUG.

Specification of Letters Patent. Patented NQV; 12, 1912.

Application filed April 1, 1911. serial No. 618,409.

To all whom it may concern:

Be it known that 1, DAVID D. GORDON. a citizen of the llnited States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful lmprovemcnt in Plugs, of which the following is a fulh'clear, concise, and exact description, reference being; had to the accompanying drawings, forming a part of this specification.

My invention relates to plugs and more particularly to that character of plug which is used in the electrical industry for making electrical connections. Plugs of the prior art on which my device is an improvement are of a general design having screw threaded means adapted for engaging screw threaded means within a socket, the proper engagement of the screw threaded means serving to complete electrical connections.

The object of my invention is to provide a plug which may be associated with an in: teriorly screw threaded or otherwise serrated socket in such a manner that the. con necting cords which lead into the plug will "not be twisted during the operation of making the connection. y

I understand it to be old to provide a plug having a screw threaded portioniotatably mounted thereon. which. is adapted for screw threaded association with the interior of the socket. 011 this latter style of plugs my invention is more particularly an improvemenh in that it not only prevents, broadly speaking. the twisting of the cords in the act of making connection, but also reduces the amount of moveanentoir rotation to which a. movable portion. of the ping need be subjected in brder to make the required connect-ion. e

In one embodiment of my invention the )lu need onl be inserted'in the socket. and h .1

a movable memberthereon rotated relatively to the plug through anangle'possibly or ten ortwenty degrees, which slight movement completes the connection. y

The objects generally speaking of my im proved plug are thus set forth these general objects may be embodied in many diilerent styles or constructions Without departing from the general scope of my. invention. Herein howeverpl will -specifi cally describe one embodiment my invention in connection with the accompanying drawing illustrating said embodiment. in which: l

Figure l is a'sideview of improved plug as shown associated with, a socket shown partly in. section"; Fig. 2 is a sectional viewot my improved plug; Fig. 3 is a sec-.

tional view on lines o-a, of l igffl; Fig. e is a sectional view on line 6 5 of Fig. 2; Fig. 5 is a sectionalview on line 'c@ of Fig. 1. Figs. 6 and 7 are; details of construction. v

Referring tothe illustriitioiis I show a socket l of ordinary construction having the screw threaded connecting portion 2 and. the

centrally located connecting spring 3 with which parts and Shay improved plug is adapted to make electrical connection: The plug proper consists 'of a body portion 4. having a central bore 5 through which the connecting cords 5 and? are adapted to enter. The cord, 7 is adapted to have its insulation removed at the left hand ex tremity as shown in Fig. 2 and the bare wire connected between a thimble 8 and ait is this screw 9 which lS' (lQ-- shank 3.52- about rotatably mounted and be permanently in electrical engagement with the contact element 10 and the roller 19 has a portion of its perlphery'serrated 'iThe flange 16.

as shown more clearly in Fig. 7 and Figs. 1 and 2. These rolls 17, 18, and 19 have projecting pins 20 by means ofwhich they are rotatably mounted within the flange 15 and have a shaft extension 21 having a crank lever extension 22 projecting through the The crank, extensions 22 are adapted to engage openings 23 provided in the collar or sleeve 13 so that when this collar 13 is rotated about its bearing 12 the rolls 17, 18 and 19 are rotated to engage the screw threaded element 2 of the socket, or to become disengaged therefrom depending upon the direction of rotation.

It will be -seen that all of the rollers 17, 1S and 19 have a portion of their outer surface cut away so as to produce a flattened portion, which flattened portion is on the periphery of the plug at the time the plug is to be inserted into the socket, after which the. collar, 13 is rotated to push the rounded surfaces of these rollers against the screw threaded element 2, thereby to wedge',,the plug in place. The

: serrations on the roller 19 preferably do not correspond exactly with the teeth of the element 2 so that this roller 19 may be readily engaged-and the plug fastened in place throughout any portion of the circular confines'of the element 2.

.A spring 24: is provided upon the collar 13 which engages notches 25, 25 at the limiting positions of the collar, that is,- the position at which the flattened surfaces of the rollers areon the exterior audin that osition in which the said rollers have een turned sothat their rounded portions are presented on the exterior of the plug.

While I have herein shown and particularly described the preferred embodiment of my invention, I-do not mean to limit myself to such specific description, but having thus shown and described one form of carrying,

out my invention, what 1 claim as new and desire to secure by Letters Patent is:

-'1. A connecting plug adapted for asso ciation with a socket andhaving a fixed terminal, a movable terminal adapted to wedgesaid lugin said socket, and rotatably mounte means for moving said terminaladapted to wedge the plug in place when rotated through a portion of a complete revolution, said means including a rotatably mounted collar and a crank shaft inter posed between said collar and said movable terminal. a I

2. A connecting. plug 'fadapted for association with a socket and having a fixed terminal, [a plurality of movable terminals adapted-to wedge said plug in'said socket, and" rotatably mounted means for moving said terminals adapted to "Wedge the plug in place when rotated through a" portion ofa "completarevolution, said means in'cludinga lution, sai

terminal adapted to wedge the plug in place when rotated through a portion of a complete revolution, said means including a rotatably mounted collar and a crank shaft interposed. between said collar and said movable terminal,

,4. A connecting .plug adapted for association with a socket and having a fixed terminal, a movable terminal havmg a serrated edge adapted to wedge said plug in said socket, and rotatably mounted means for moving said terminal adapted to wedge the plug in place-when rotated through a portion of a complete revolution, said means 5 including a rotatably'mounted collar and'a crank shaft interposed between said collar and said movable terminal. I

5. A connecting plug adapted .forasse ciation with a socket and havinga; fixedj terminal, a plurality of movable terminals having serrated edges adapted to wedge said plug in said socket, and .rotatably mounted means for moving said terminals adapted to wedge the plug in place [when rotated through a portion of acoinplete' revolution, said means .including rota-tably mounted collar and crank shafts'interposedfbetween said collar and said movable terminals.

6. A connecting plug adapted for asso-- ciation with a socketand having a fixed terminal, a movable terminal havinga serrated edge adapted to wedgesaid plug in said socket, statioiiarily mounted contact means adapted for. contact making association with said terminal, and rotatably' mounted means for moving said terminal adapted to wedge the plng'in place when rotated through. a portion of a complete revomeans including a rotatably mounted collar and a crank shaft interposed betlween said collar and said movable termina 7. A connecting plug adapted for association with a socket having a fixed 'terminal, a plurality of independently mounted rotatable terminals adapted to wedge said plug in said socket, and rotatable means concentrically arranged upon said plug to operate said terminals. I

8. A connecting plug adapted for association with a soc get, having a fixed termi-v na I,- -arot-atableterminal adapted to wedge said plug in said socket, and means-concentrio with said plug to operate saidterminal."

2' plug in said socket, and a collar to operate 9. A connecting plug adanted for asso' said plug in said socket, and acollar to operl0 ciation with a socket, having a fixed termiate said terminal. nal, a luralit-y of independently mounted In Witness whereof, I hereunto subscribe rotatab e terminals adapted to Wedge said my name this 25th day of March A. D., 1911.

\ said terminals. 1 DAVID GORDON 10. A connecting plug adapted for asso- I Witnesses: ciatio'n with a socket, having a fixed termi- O. M. VVERMICH, nal, a rotatable terminal adapted to Wedge 'HA'ZEL JoNu- 

